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No.  1741 


DESCRIPTION  AND  INSTRUCTIONS 
FOR  THE  USE  OF 

IFLE  AND  HAND  GRENADES 


{FOUR  PLATES) 


MAY  18,  1911 
REVISED  JANUARY  12,  1917 


WASHINGTON 

GOVERNMENT  PRINTING  OFFICE 

1917 


No.  1741 

"U.S.   Orc/^',cl  ^.c^e        p/et't. 

DESCRIPTION  AND  INSTRUCTIONS 

FOR  THE  USE  OF 

RIFLE  AND  HAND  GRENADES 

{FOUR  PLATES) 

MAY  18,  1911 

REVISED  JANUARY  12,  1917 

#  „. 

\,>  ;V^K,i  V  '.,-:*%'/^^'.'''^ 

WASHINGTON 

GOVERNMENT  PRINTING  OFFICE 

1917 

^^\■ 


16 


u^ 


VVak  Depautment, 

C>FFJ(JE  OF   THE   ChIEF   OF   OeDNANCE, 

Washmgton,  January  12,  1917. 
This  manual  is  published  for  the  information  and  government  of  the  Regular 
Army  and  National  Guard  of  the  United  States. 
By  order  of  the  Secretary  of  War  : 

William  Ceozieb, 
Brigadier  General,  Chief  of  Ordnance, 

(3) 


G3173 


Digitized  by  the  Internet  Archive 

in  2007  with  funding  from 

IVIicrosoft  Corporation 


http://www.archive.org/details/descriptioninstrOOunitrich 


WARNING! 

To  Prevent  the  Possibility  of  Accident  When  Using  Grenades, 
THE  Following  Should  be  Strictly  Observed. 

HAND  GRENADES. 

1.  Do  not  use  live  grenades  until  practice  has  been  had  with  dum- 
mies.   Untrained  men  are  very  erratic  and  may  injure  bystanders. 

2.  If  the  grenade  is  "  tossed,"  swinging  in  a  vertical  plane,  great 
care  must  be  taken  not  to  hit  the  ground  while  swinging. 

3.  Do  not  throw  a  live  grenade  unless  cover  is  at  hand  behind 
which  the  operator  and  spectators  may  seek  shelter  before  the  gre- 
nade strikes  the  ground.    It  is  unsafe  to  remain  in  the  open. 

4.  If  a  hand  grenade  fails,  it  should  be  recovered  and  placed  in  a 
deep  stream  or  other  body  of  water  or  buried  in  the  ground. 

5.  In  handling  live  grenades  always  hold  the  body  in  the  hand, 
and  never  lift  by  means  of  the  streamer.  The  rope  sometimes  breaks. 
This  is  particularly  true  after  the  grenade  has  been  thrown. 

RIFLE  GRENADES. 

1.  Do  not  fire  a  live  grenade  unless  cover  is  at  hand  behind  which 
the  firer  and  spectators  may  take  shelter  before  the  grenade  strikes 
the  ground.  The  stem  of  the  grenade  is  sometimes  thrown  several 
hundred  yards  to  the  rear,  and  would  make  a  dangerous  if  not  fatal 
wound  even  at  that  distance. 

2.  If  a  rifle  grenade  fails,  it  should  not  be  left  where  it  might  be 
picked  up  by  an  inexperienced  person.  It  should  be  picked  up 
with  the  stem  pointing  downward  and  should  be  kept  in  this  po- 
sition till  placed  in  a  deep  stream  or  other  body  of  water  or  buried 
in  the  ground. 

3.  If  it  is  put  aside  until  the  end  of  the  exercise,  it  is  well  to  stick 
the  stem  in  the  ground  so  as  to  leave  it  standing  upright.  This  po- 
sition should  be  an  indication  as  to  its  condition,  as  the  stem  of  a 
grenade  to  be  fired  should  not  be  put  in  earth  in  such  a  way  that 
the  central  channel  might  be  closed. 

4.  A  grenade  which  has  failed  should  not  again  be  fired. 

76803—17 

(5) 


PLATE  I. 


BABBITT  RIFLE  GJ^ENWE . 


I  I  I  I  I  1^ 


2  /NCH£:S. 


GRENADES. 


The  rifle  grenade  adopted  by  the  Ordnance  Department  is  that 
known  as  the  Babbitt  rifle  grenade,  and  is  illustrated  in  Plate  I  of 
this  pamphlet.  The  rifle  grenade  is  intended  to  be  fired  from  a 
service  magazine  rifle,  model  of  1903,  by  use  of  a  specially  loaded 
blank  cartridge. 

The  hand  grenade  has  been  developed  simultaneously  with  the 
rifle  grenade  and  the  type  adopted  by  the  department  is  illustrated 
in  Plate  II  of  this  pamphlet.  This  grenade  is  thrown  by  hand  in 
much  the  same  manner  as  a  stone  is  thrown  from  a  sling.  These 
grenades  are  high  explosive  misgiles  and  should  be  used  at  short 
ranges  from  behind  cover. 

Rifle  and  hand  grenades  are  packed  in  boxes  containing  32  each. 


THE  ACTION  OF  THE  RIFLE  GRENADE. 


The  construction  of  the  rifle  grenade  and  the  nomenclature  of  its 
component  parts  are  indicated  in  Plate  I. 


(PLATE  I.) 

• 

NOMENCLATURE. 

0.  Paper  disk. 

p.  Plug. 

1).  Sabot. 

q.  Plunger  locking  pin. 

c.  Stem. 

r.  Plunger. 

d.  Stem  ring. 

s.  Plunger  restraining  spring. 

e.  Closing  screw. 

t.  Casing. 

/.  Safety  wire. 

u.  Primer  holder. 

g.  Safety  pellet  screw. 

V.  Percussion  composition. 

h.  Paper  disk. 

w.  Primer  covering. 

j.  Safety  pellet. 

x.  Primer  housing. 

k.  Safety  pin. 

y.  Primer  charge. 

I.  Body. 

g.  Primer  closing  disk. 

m.  Trinitrotoluol. 

aa.  Detonator  cup. 

n.  Detonating  cup  filling  disk. 

&&.  Detonating  compound. 

The  grenade  is  designed  to  be  fired  at  a  constant  angle  of  eleva- 
tion, namely  45°,  except  as  noted  below  for  ranges  under  50  yards. 
The  range  attained  is  dependent  upon  the  length  of  the  stem  inserted 
in  the  bore  of  the  rifle.  Tests  have  shown  that  within  considerable 
limits  the  range  is  but  little  affected  by  small  changes  in  the  angle 
of  elevation,  near  45°,  while  a  change  in  the  length  of  inserted  stem 
gives  an  appreciable  change  in  the  range. 

(7) 


8 

The  rifle  grenade  should  be  set  for  range  as  follows:  The  grenade 
having  been  removed  from  its  tin  packing  container,  grasp  the  stem 
with  the  thumb  down  and  the  thumb  nail  in  the  groove  marking  the 
range  desired.  Insert  the  stem  in  the  muzzle  of  the  service  rifle  and 
shove  down  until  the  stem  ring  comes  against  the  end  of  the  thumb 
nail. 

The  special  grenade  cartridge  is  inserted  in  the  chamber  and  the 
rifle  fired  either  from  the  shoulder,  or  better  by  resting  the  butt  on 
the  ground,  the  firer  kneeling  to  the  left,  fixing  the  direction  and 
estimating  the  desired  45°  elevation.  The  rifle  should  be  held  as 
firmly  as  possible. 

Remove  the  safety  wire  /. 

When  the  special  blank  cartridge  above  referred  to  is  fired  in  the 
gun,  the  flaming  gases  from  its  charge  serve  the  double  purpose  of 
ejecting  the  grenade  from  the  rifle  and  of  arming  the  fuse  of  the 
grenade.  The  latter  action  is  accomplished  as  follows:  The  flame 
passes  up  through  the  bore  of  the  stem  <?,  through  the  passages  in 
the  closing  screw  e,  and  holes  in  the  safety  pellet  screw  g^  and 
ignites  the  safety  pellets  p  The  compressed  rifle  powder  pellets 
serve,  before  being  burned  out,  to  hold  the  safety  pins  h  in  such 
a  position  that  their  conical  points  engage  in  the  circumferential 
groove  in  the  plunger  v^  and  prevent  this  plunger  from  moving 
forward.  It  will  thus  be  seen  that  the  fuse  can  not  be  armed  until 
after  the  exit  of  the  grenade  from  the  rifle.  After  the  compressed 
rifle  powder  y  has  been  consumed,  and  the  safety  pins  k  released,  the 
plunger  r  is  still  restrained  from  moving  forward  and  striking  the 
primer  covering  u\  by  means  of  the  plunger  restraining  spring  s. 
Upon  impact  with  the  ground,  after  having  been  fired  from  the 
rifle  in  the  manner  stated,  the  plunger  r  moves  quickly  forward, 
striking  the  primer  covering  w^  igniting  the  percussion  composition 
'y,  which  in  turn  ignites  the  primer  charge  y  and  this  in  turn  ignites 
the  detonating  compound  hh.  The  detonation  of  this  compound 
causes  the  detonation  of  the  trinitrotoluol  filling  tti. 

The  detonation  of  the  grenade  upon  impact  is  violent,  and  the 
grenade,  body,  and  components  are  broken  up  into  a  number  of 
effective  fragments  which  have  a  considerable  range,  making  it 
unsafe  for  the  firers  or  observers  to  be  in  the  open  when  the  grenade 
detonates.  At  the  proving  ground  the  stems  have  been  found  over 
300  yards  in  rear  of  the  point  of  burst.  Rifle  grenades  may  also  be 
fired  point  blank  if  desirable. 

INSTRUCTIONS  FOR  USE  OF  THE  RIFtE  GRENADE. 

Rifle  grenades  are  shipped  in  bandoleers  of  olive-drab  cloth,  each 
of  which  contains  four  rifle  grenades.    The  grenades  are  packed  in 


the  bandoleer  in  hermetically  sealed  tin  containers,  each  carrying 
one  rifle  grenade  complete  and  one  special  blank  cartridge  for  use  in 
propelling  the  grenade.  The  bandoleer  is  opened  by  unfastening  or 
tearing  off  the  stripping  tape.  The  tin  containers  are  provided  with 
a  tearing-off  strip  which  may  be  removed  with  the  fingers.  This 
should,  however,  not  be  done  until  the  grenade  is  to  be  actually  used. 
The  bandoleer  is  carried  over  the  shoulder,  the  end  tapes  being  passed 
around  the  waist  and  tied  in  front  or  as  may  be  most  convenient. 
The  weight  of  a  complete  bandoleer  with  four  grenades,  containers, 
and  blank  cartridges  is  6  pounds  13.76  ounces;  the  weight  of  the 
packing  can  including  the  weight  of  the  grenade  and  blank  cartridge 
is  1  pound  lO.lG  ounces;  the  Aveight  of  the  grenade  proper  is  1  pound 
(3.84  ounces,  and  the  weight  of  the  blank  cartridge  is  210  grains. 

It  will  be  noted  that  the  stem  c  of  the  grenade  is  graduated  with 
circular  grooves  corresponding  to  different  lengths  of  insertion  into 
the  bore  of  the  rifle,  which  in  turn  correspond  to  the  various  ranges. 
There  is  one  set  of  graduations  in  yards  of  range  based  upon  an  angle 
of  elevation  of  45°.  These  graduations  vary  from  300  yards  to  80 
yards  as  a  minimum.  In  order  to  cover  the  space  between  the  mini- 
mum range  as  marked  on  the  stem  and  the  firing  point,  an  angle  of 
elevation  of  80°  may  be  used.  With  this  angle  of  elevation,  the 
ranges  obtained  will  be  approximately  one-fifth  of  the  ranges  marked 
on  the  stem.  The  angle  of  elevation  of  80°  may  be  closely  approxi- 
mated by  resting  the  butt  of  the  rifle  upon  a  level  piece  of  ground  or 
upon  a  board,  the  surface  of  which  is  horizontal.  In  other  words, 
the  angle  between  the  horizontal  surface  and  the  bore  of  the  rifle 
with  the  rifle  in  the  position  of  "order  arms"  is  approximately  80°. 

A  range  table  giving  more  exact  ranges  for  both  the  live  and  the 
dummy  rifle  grenades  is  given  below : 


Live    and    dummy 

Live     and     dummy 

grenades,  elevation 

grenades,  elevation 

45°. 

80°. 

Insert  stem 

Insert  stem 

Range. 

to  gradua- 
tion 

Range. 

to  gradua- 
tion 

marked- 

marked— 

Yards. 

Yards. 

Yards. 

Yards. 

80 

80 

15 

80 

100 

100 

20 

100 

120 

120 

26 

120 

140 

140 

32 

140 

160 

160 

38 

160 

180 

180 

44 

180 

200 

200 

50 

200 

220 

220 

56 

220 

240 

240 

63 

240 

260 

260 

70 

260 

280 

280 

77 

280 

300 

300 

85 

300 

10 

The  maximum  pressure  obtained  from  the  special  blank  cartridge 
issued  with  the  grenades  is  approximately  48,000  pounds  per  square 
inch,  when  the  stem  insertion  is  complete,  i.  e.,  when  the  stem  ring 
stops  against  the  closing  screw  of  the  grenade.  This  pressure  corre- 
sponds, as  may  be  seen  from  the  range  table,  page  9,  to  a  range  of 
300  yards. 

In  firing  the  rifle  grenade  it  has  been  found  that  the  best  results 
can  be  obtained  by  resting  the  butt  of  the  rifle  on  the  ground  and 
estimating  the  angle  which  the  barrel  makes  with  the  horizontal, 
which  angle,  as  stated  above,  should  be  either  45°  or  80°,  these  angles 
being  those  used  for  the  determination  of  the  graduation  upon  the 
stem.  It  has  been  found  that  the  rifle  grenade  is  not  detonated  by 
impact  of  the  small-arms  bullet  unless  it  so  happens  that  the  bullet 
actually  strikes  the  fulminate  composition  n.  It  will  also  be  observed 
that  no  blank  cartridges  other  than  those  issued  by  the  Ordnance 
Departr)ient  should  be  v^ed  with  t/ie  7^fe  grenade.  FaiLure  to  observe 
this  caution  may  result  in  injury  to  both  the  men  and  the  r)iateriel. 
Should  a  rifle  grenade  fail  to  detonate  on  impact  after  having  been 
fired  from  a  rifle,  it  should  be  handled  with  extreme  caution,  in  view^ 
of  the  fact  that  the  safety  feature  as  described  above  has  now  been 
removed.  To  handle  such  a  grenade,  it  should  be  carried  with  the 
stem  down  and  if  practicable  thrown  into  deep  water,  from  which  its 
recovery  is  improbable.  If  that  be  not  practicable,  the  grenade  should 
be  buried  in  the  ground  where  it  will  not  likely  be  recovered.  If  it 
should  be  necessary  to  disassemble  a  grenade,  either  fired  or  unfired, 
the  work  should  be  done  only  in  the  presence  of  a  responsible  person. 
To  do  this,  place  the  grenade,  stem  down,  in  a  vise  or  clamp.  With  a 
wrench  unscrew  the  body  and  remove  the  plunger  if  free.  If  the 
plunger  of  a  fired  grenade  can  not  be  removed,  the  safety  pellets 
have  failed  to  burn  out,  and  while  the  reassembled  grenade  would 
be  safe,  it  would  probably  fail  again.  A  grenade  having  once  failed 
should  not  be  again  fired  from  the  rifle. 

DUMMY  RIFLE  GRENADES. 

The  dummy  rifle  grenade  illustrated  in  Plate  III  is  issued  for 
instruction  purposes,  and  is  similar  to  the  rifle  grenade  in  Plate 
I  of  this  pamphlet,  except  that  the  body  is  not  provided  with  grooves. 
It  may  from  this  feature  be  distinguished  readily  from  the  live 
grenade.  As  a  further  precaution,  this  grenade  is  marked  "  dummy." 
The  stem  of  this  grenade  is  graduated  in  a  manner  entirely  similar 
to  the  method  used  for  the  stem  of  the  live  grenade,  and  the  weight 
of  the  dummy  grenade  is  equal  to  that  of  the  live  grenade.  The 
dummy  grenade  is  for  use  in  target  practice.  The  graduations  for 
the  stem  of  the  dummy  grenade  are  given  for  the  same  ranges  as  in 


mNPGPm/QDf. 


PLATE  II 


q        .s 

M  I   I   I  I   I  I   I 


I  I 


2  /AC/ZfS. 


PLATE  III. 


PUM/yJY  R/FLe  GJ?f^N^/:^. 


S^BOT. 


ST€MJ?/M^. 


IPY. 


-PLUG. 


I  I  I  I  I  I  I  I  I  1 


2  lt1CH£3. 


I  I 


11 

the  case  of  the  live  grenade,  but  owing  to  the  fact  that  the  stem  of 
the  dummy  grenade  is  solid  and  has  no  bore  along  its  longitudinal 
axis,  the  ranges  obtained  with  it  are  slightly  greater  than  those  ob- 
tained with  the  live  grenade  for  equal  lengths  of  stem  insertion.  In 
other  words,  for  this  and  other  reasons,  the  stems  of  the  dummy  and 
live  grenades  are  not  interchangeable.  The  range  table  for  the  gre- 
nade, both  for  45°  elevation  and  80°  elevation,  is  given  on  page  9. 
The  manipulation  of  the  dummy  rifle  grenade  is  entirely  similar  to 
that  of  the  live  grenade,  so  far  as  the  stem  insertion  and  firing  from 
the  rifle  is  concerned.  The  dum.my  grenade  may  be  fired  repeatedly. 
After  the  stem  has  become  deformed  the  dummy  grenade  can  again 
be  made  serviceable  by  the  addition  of  a  new  stem.  Each  dummy 
rifle  grenade  issued  is  accompanied  by  5  extra  stems  and  50  blank 
cartridges.  These  grenades  are  not  issued  in  tin  packing  boxes  or 
with  bandoleers. 

ACTION  OF  THE  HAND  GRENADE. 

The  construction  of  the  hand  grenade  and  the  nomenclature  of  its 
component  parts  are  indicated  in  Plate  II : 

(PLATE  II.) 
NOMENCLATURE. 


a.  Streamer. 

h.  Streamer  holder. 

c.  Body. 

d.  Trinitrotoluol. 

e.  Cup  detonator. 
/.  Filling  washer. 

g.  Primer  closing  disk. 
Ti.  Primer  covering. 
;.  Primer  charge. 
k.  Primer  housing. 


I.  Percussion  composition. 
m.  Hood, 
n.  Firing  pin. 
p.  Fulminate  composition. 
q.  Cup-detonator  sleeve. 
r.  Primer  holder. 
8.  Closing  screw. 
t.  Safety  cup. 
M.  Firing  pin  holder. 


The  action  of  the  hand  grenade  is  as  follows:  The  hood  m  is  re- 
moved from  the  grenade  by  twisting  the  hood  in  such  a  manner 
as  to  release  the  bayonet  joint.  The  safety  cup  t  is  then  removed 
and  the  hood  replaced  by  repeating  the  motion  of  disassembling 
in  reverse  order,  care  being  exercised  not  to  attempt  to  force  the 
hood  past  the  stop  pins,  as  the  safety  feature  has  now  heen  removed. 
When  the  hood  is  in  the  proper  position  to  cause  the  fuse  to  be 
armed,  the  stud  in  the  body  which  engages  in  the  bayonet- joint 
groove  in  the  hood  should  be  opposite  the  longitudinal  continua- 
tion of  the  bayonet- joint  slot.  The  fuse  is  now  armed,  and  when 
the  grenade  is  thrown  so  as  to  fall  upon  the  firing-pin  end  the 
weight  of  the  grenade  causes  the  thin  sections  of  the  hood  m  to 


12 

be  sheared  by  the  small  pins  resting  against  the  shearing  sections, 
thus  allowing  the  grenade  to  move  downward  into  the  hood,  tele- 
scoping therewith,  and  strike  the  firing  pin  n  against  the  percussion 
composition  I.  The  impact  of  the  firing  pin  ignites  the  percussion 
composition,  which  in  turn  ignites  the  powder  j^  causing  the  detona- 
tion of  the  fulminate  composition  p  and  of  the  trinitrotoluol  d. 
These  detonations  result  in  the  fragmentation  of  the  grenade.  The 
streamer  or  tail  of  the  hand  grenade  is  for  the  purpose  of  swinging 
the  grenade  in  throwing.  Preparatory  to  throwing  the  grenade  the 
unravelled  portion  of  the  streamer  should  be  wadded  up  in  the  palm 
of  the  hand  and  grasped  together  with  the  knot.  In  flight,  the 
rope,  acting  as  a  tail,  steadies  the  flight  of  the  grenade  and  tends 
to  cause  it  to  strike  head  on  in  an  advantageous  manner  for  the 
successful  action  of  the  fuse. 

INSTRUCTIONS  FOR  THE  USE  OF  THE  HAND  GRENADE. 

The  grenade  is  issued  in  cylindrical  tin  cans,  hermetically  sealed, 
and  provided  with  a  tin  tearing  strip  which  should  not  be  removed 
until  just  before  the  hand  grenade  is  required  for  use.  Four  hand 
grenades  are  packed  in  these  tin  cans  and  carried  in  an  olive  drab 
bandoleer  somewhat  similar  to  that  used  for  the  transportation  of 
small-arms  ammunition.  These  bandoleers  are  provided  with  a  strap 
so  that  the  bandoleer  can  be  suspended  from  the  shoulders.  This 
strap  is  folded  across  the  back  to  the  bandoleer  and  stitched  in  place 
with  a  weak  stitching.  Hooks  are  also  provided  so  that  the  bando- 
leer may  be  suspended  from  the  belt  if  this  manner  of  carrying  is 
preferred.  The  bandoleer  pouch  is  divided  into  four  compartments, 
each  containing  a  hand  grenade,  and  all  are  covered  by  a  flap  secured 
by  a  buckle  so  that  the  compartments  may  be  readily  opened  for 
the  extraction  of  the  grenade. 

Having  taken  the  grenade  from  the  bandoleer,  the  tin  box  is 
opened  by  tearing  off  the  soldering  strip,  which  releases  the  cover  of 
the  can.  The  hand  grenade  having  been  removed  from  the  container, 
the  grenade  must  be  armed  before  it  is  thrown,  and  this  is  done  by 
removing  the  safety  cup  ^,  as  described  above.  Having  armed  the 
fuse  of  the  grenade  and  replaced  the  hood  m  in  the  proper  armed 
position,  the  grenade  is  ready  to  be  thrown.  In  this  condition  the 
grenade  should  be  carefully  handled  and  not  permitted  to  strike 
either  on  the  ground  adjacent  to  the  thrower  or  in  the  vicinit}^  of 
friendly  troops.  The  thrower  and  all  friendly  troops  should  have 
cover  before  the  grenades  strike,  as  the  fragments  resulting  from 
their  detonation  have  a  longer  range  than  the  distance  to  which 
the  grenade  as  a  whole  may  be  thrown.  The  rope  of  the  grenade 
is  made  in  a  convenient  length  for  the  soldier  of  average  stature,  but 


PLATE   IV. 


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13 

this  length  may  be  decreased  by  adding  another  knot.  The  manner 
of  throwing  the  grenade  is  dependent  upon  the  free  space  available 
for  swinging  it.  When  the  thrower  has  ample  space  behind  a 
parapet,  it  is  best  to  swing  it  around  the  head  as  with  a  sling,  both 
for  accuracy  and  safety.  Untrained  men  will  naturally  swing  the 
grenade  in  a  vertical  plane.  The  tests  at  the  Sandy  Hook  Proving 
Ground  indicate  that  this  method  is  accompanied  by  considerable 
danger,  as  the  thrower  may  strike  the  ground  with  the  grenade  in 
the  act  of  whirling  it  or  may  release  it  so  that  its  flight  will  be  nearly 
vertical,  causing  the  grenade  to  fall  back  near  the  thrower.  The 
ranges  that  can  be  attained  with  this  form  of  grenade  are  not  great 
and  vary  w4th  the  strength  and  skill  of  the  thrower.  Prior  to  using 
service  grenades,  troops  should  be  instructed  in  the  use  of  dummy 
grenades.  In  assembling  the  hood  m,  after  removing  the  safety  cup  t^ 
care  sTwuld  he  taken  not  to  attempt  to  force  the  hood  too  far  upon 
the  hutt  of  the  grenade  hody^  or  explosion  may  occur.  The  rope  of 
the  grenade  should  also  be  examined  to  make  sure  it  is  in  good  con- 
dition and  not  liable  to  break  while  the  grenade  is  being  whirled. 

In  case  a  grenade  which  has  been  thrown  and  failed  to  detonate 
is  recovered,  it  should  be  handled  with  the  greatest  care.  Such 
grenades  can  be  rendered  safe  for  transportation  bj^  cautiously  with- 
drawing the  hood  m  from  the  grenade  body,  replacing  the  safety  cup 
t  in  the  hood,  and  then  reassembling  the  hood  to  the  grenade  body. 
Or  in  case  it  be  desired  to  throw  the  grenade  a  second  time,  this 
may  be  accomplished  by  drawing  back  the  hood  m  until  it  will  have 
its  normal  stroke  upon  impact  and  then  throwing  in  the  usual  man- 
ner. However,  if  practicable,  a  grenade  which  has  failed  should  be 
thrown  into  deep  water  from  which  its  recovery  is  improbable,  or 
should  be  buried  in  the  ground. 

The  weight  of  the  bandoleer  packed  with  four  containers  and  hand 
grenades  is  6  pounds,  and  the  weight  of  one  hand  grenade  complete 
is  1  pound  5  ounces.  The  weight  of  the  tin  container  is  1.92  ounces, 
and  the  weight  of  the  bandoleer  is  4.32  ounces. 

DUMMY    HAND    GRENADES. 

Dummy  hand  grenades  are  issued  for  instruction  purposes  and  for 
practice  in  throwing  grenades.  These  dummies  are  similar  in  weight 
and  form  to  the  live  grenade,  except  that  the  body  of  the  grenade  is 
made  of  bronze  instead  of  cast  iron  or  steel  and  not  grooved,  but 
smooth  upon  its  exterior  surface  so  as  to  distinguish  it  from  the  live 
grenade,  which  is  provided  with  grooves.  The  dummy  hand  grenade 
is  also  marked  Avith  the  word  "  Dummy."  The  cords  attached  to 
the  dummy  grenades  will,  with  continued  use,  become  worn  and  for 


14 

this  reason  the  cord  should  be  examined  before  whirling  the  grenade, 
in  order  to  avoid  accidents.  To  obtain  accuracy  and  range  in 
throwing  the  hand  grenade  requires  preliminary  drill  and  practice 
with  the  dummy  grenade.  For  maximum  effect  the  grenade  should 
be  detonated  within  a  few  feet  of  the  object  at  which  it  is  thrown. 
This  requires  accuracy  usually  acquired  only  by  a  considerable 
amount  of  practice.  The  dummy  hand  grenade  is  shown  in 
Plate  IV. 

With  each  dummy  hand  grenade  are  issued  five  extra  streamers. 

War  Department, 

Office  of  the  Chief  of  Ordnance, 

Washington,  January  12,  1917. 
May  18, 1911. 
Revised  January  12,  1917. 
Form  No.  1741. 
Ed.  Jan.  12-17—5,000. 


INDEX. 

Page. 

Dummy  hand  grenades .' 13 

Dummy  rifle  grenades 10 

General  description 7 

Hand  grenade: 

Action 11 

Instructions  for  use , 12 

Nomenclature 11 

Range  table 9 

Rifle  grenade: 

Action 7 

Instructions  for  use 8 

Nomenclature. 7 

Warning , . .  5 

(15) 
O 


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